Rock or coal drill



- (NMode1.)

J. SHE'IB.

.ROOK 0R GOAL DRILL. No. 357,637, Patented Feb. 15, 1887.

side of the sleeve 0.

. UNITED STATES PATENT OEEicE.

JAKOB SHEIB, OF RAPID CITY, ILLINOIS.

ROCK OR COAL DRILL.

SPECIFICATION forming part ofLetters Patent No.' 357,637, dated February 15, 1887.

Application filed June 10, 1886. Serial No. 204,709. (No model.)

To all whom it may concern:

Be it known that I, J AKOB SHEIB, acitizen of the United States, residing at Rapid City, in the county of Rock Islandand State of Illinois, have invented certain new and useful Improvements in Rock or Coal Drills; and-I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The object of the invention is to drill holes in a body of rock, coal, and other substances for the introduction of a charge of powder which will blast or break it up.

Figure 1 of the drawings is a plan view. Fig. 2 isa longitudinal vertical section through the feed-screw and the rotary sleeve keyed thereto, and Fig. 3 is a detail view of the stem and swivel.

In the drawings, A represents a drill-bit fastened in the end I) of the feed-screw B, which is channeled at b, to receive the key 0 on in- The latter being rotated by the bevel-wheel D, made fast thereto, carries the screw and bit around with it, and, as the screw revolves within corresponding nuts, E E, it is gradually fed forward. The nuts are made in two parts, e e, hinged together, so that they may be opened for the ready removal or insertion of the screw, and are slotted on the covers 6 at 6 to receive the upward projection, 6 on the body 6. Trausversely through the projection e is a perforation through which passes a pin, e", to fasten the covers down.

On each side of the nuts E E is placed a trunnion, 6 The nuts are rigidly attached or formed integral with the frame F, having the arms f f and intermediate bearing, f In the latter turns the shaft G, having a hand-crank,

g, and a small pinion, g, which meshes with the bevel-wheel D. Thus it will be seen that the drill may be operated by the hand-crank g. The crank might be applied directly to the end of feedscrew, but I prefer the mechanism described.

H is the bearing-piece, having the downwardly-inclined notches h 72, in which are supported the trunnions 0 c and swiveled on a pivot, h, upon the bar I which has an end cavity, 6, and a transverse hole, '6.

J is the stem which has the round tenonj,

which works in the cavity or hole t, while apin, K, passes through holes ij to hold the parts I J firmly together. The stem J is secured in a wall of coal or rock. as shown 'in the drawings, by the wedge L and pointed studs Z.

The swivel bearing-piece H forms a movable or swinging rest by which the bit may be turned in any desired direction, while by opening the nuts E E the drill may be readily withdrawn and the bevel-wheel sleeve slid back.

Having thus described all that is necessary to a full understanding of my invention, what I claim as new, and desire to protect by Letters Patent, is

1. In a rock or coal drill, the combination of the feed-screw B, sleeve 0, bevel-wheel D, nuts E E, and frame F, the latterhaving arms ff and bearing f, as and for the purpose described.

' 2. The bearingpiece H, having inclined notches h h, and the bar I, having pivot h on which piece H is swiveled, in combination with a frame, F, carrying nuts E, having the trunnions e 0 as and for the purpose specified,

.In testimony whereof I affix my signature in presence of two witnesses.

\ J AKOB SHEIB.

Witnesses:

D. J. WEBB, JOHN SCHOEOHTER. 

